<template>
  <div class="header">
    <!-- 顶部导航 -->
    <div class="nav-topbar">
      <div class="container">
        <div class="topbar-menu">
          <a href="javascript:;">小米商城</a>
          <a href="javascript:;">MUI</a>
          <a href="javascript:;">云服务</a>
          <a href="javascript:;">协议规则</a>
        </div>
        <div class="topbar-user">
          <a href="javascript:;" v-if="username">{{ username }}</a>
          <a href="javascript:;" v-if="username" @click="logout">退出</a>
          <a href="javascript:;" v-if="username" @click="goOrderList">我的订单</a>
          <a href="javascript:;" v-if="!username" @click="login">登录</a>
          <a href="javascript:;" v-if="!username">注册</a>
          <a class="my-cart" href="javascript:;" @click="goToCart">
            <span class="icon-cart"></span>购物车({{ cartCount }})
          </a>
        </div>
      </div>
    </div>
    <!-- 头部nav -->
    <div class="nav-header">
      <div class="container">
        <div class="header-logo">
          <a href="/#/index"></a>
        </div>
        <div class="header-menu">
          <div class="item-menu">
            <span>小米手机</span>
            <div class="children">
              <!-- 商品列表 -->
              <ul>
                <!-- 商品 -->
                <li class="product" v-for="v of phoneList" :key="v.id">
                  <a :href="`/#/product/${v.id}`" target="_blank">
                    <div class="pro-img">
                      <img v-lazy="v.mainImage" :alt="v.subtitle" />
                    </div>
                    <div class="pro-name">{{ v.name }}</div>
                    <div class="pro-price">{{ v.price | currency }}</div>
                  </a>
                </li>
              </ul>
            </div>
          </div>
          <div class="item-menu">
            <span>RedMi红米</span>
          </div>
          <div class="item-menu">
            <span>电视</span>
            <div class="children">
              <!-- 商品列表 -->
              <ul>
                <!-- 商品 -->
                <li class="product" v-for="(v, i) of 6" :key="i">
                  <a href="" target="_blank">
                    <div class="pro-img">
                      <img v-lazy="`/imgs/nav-img/nav-3-${i + 1}.jpg`" />
                    </div>
                    <div class="pro-name">小米壁画电视 65英寸</div>
                    <div class="pro-price">6999元</div>
                  </a>
                </li>
              </ul>
            </div>
          </div>
        </div>
        <div class="header-search">
          <div class="wrapper">
            <input type="text" name="keyword" />
            <a href="javascript:;"></a>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { mapState } from "vuex";
export default {
  name: "nav-header",
  data() {
    return {
      phoneList: [],
    };
  },
  computed: {
    // username(){
    //   return this.$store.state.username;
    // },
    // cartCount(){
    //   return this.$store.state.cartCount;
    // }
    ...mapState(["username", "cartCount"]),
  },
  filters: {
    currency(val) {
      if (!val) return "0.00";
      return `¥${val.toFixed(2)}元`;
    },
  },
  mounted() {
    this.getProductList();
    let params = this.$route.params;
    if (params && params.from == "login") {
      this.getCartCount();
    }
  },
  methods: {
    //获取商品
    getProductList() {
      this.axios
        .get("/products", {
          params: {
            categroyId: "10012",
            pageSize: 10,
          },
          //main.js定义了拦截
        })
        .then((res) => {
          //当数据大于6条时截取6条数据
          if (res.list.length > 6) {
            //接口前4条数据有问题
            this.phoneList = res.list.slice(4, 10);
          }
        });
    },
    //去登录
    login() {
      this.$router.push("/login");
    },
    //获取购物车商品数量
    getCartCount() {
      this.axios.get("/carts/products/sum").then((res = 0) => {
        //保存到vuex里面
        this.$store.dispatch("saveCartCount", res);
      });
    },
    //退出登录
    logout() {
      this.axios.post("/user/logout").then(() => {
        this.$message.success("退出成功");
        this.$cookie.set("userId", "", { expires: "-1" });
        this.$store.dispatch("saveUserName", "");
        this.$store.dispatch("saveCartCount", 0);
      });
    },
    //去购物车
    goToCart() {
      this.$router.push("/cart");
    },
    //去订单列表页
    goOrderList(){
      this.$router.push('/order/list');
    }
  },
};
</script>

<style lang="scss">
@import "../assets/scss/mixin.scss";

.header {
  .nav-topbar {
    height: 39px;
    line-height: 39px;
    background-color: #333;
    color: #b0b0b0;
    .container {
      @include flex();
      a {
        display: inline-block;
        color: #b0b0b0;
        margin-right: 17px;
      }
      .my-cart {
        width: 110px;
        background-color: #ff6600;
        text-align: center;
        color: #fff;
        margin-right: 0;
        .icon-cart {
          @include bgImg(16px, 12px, "/imgs/icon-cart-checked.png");
          margin-right: 4px;
        }
      }
    }
  }
  .nav-header {
    .container {
      position: relative;
      height: 112px;
      @include flex();
      .header-menu {
        display: inline-block;
        width: 643px;
        padding-left: 209px;
        .item-menu {
          display: inline-block;
          color: #333;
          font-weight: bold;
          font-size: 16px;
          line-height: 112px;
          margin-right: 20px;
          span {
            cursor: pointer;
          }
          &:hover {
            color: #ff6600;
            .children {
              height: 220px;
              opacity: 1;
              transition: 0.5s;
            }
          }
          .children {
            position: absolute;
            top: 112px;
            left: 0;
            width: 1226px;
            height: 0;
            opacity: 0;
            overflow: hidden;
            border-top: 1px solid #e5e5e5;
            box-shadow: 0px 7px 6px 0px rgba(0, 0, 0, 0.11);
            z-index: 10;
            background-color: #fff;
            transition: 0.5s;
            .product {
              position: relative;
              float: left;
              width: 16.6%;
              height: 220px;
              font-size: 12px;
              line-height: 12px;
              text-align: center;
              &::before {
                content: "";
                position: absolute;
                top: 28px;
                right: 0;
                border-right: 1px solid #d7d7d7;
                height: 100px;
                width: 1px;
              }
              &:last-child::before {
                display: none;
              }
              a {
                display: inline-block;
              }
              img {
                width: auto;
                height: 111px;
                margin-top: 26px;
              }
              .pro-img {
                height: 137px;
              }
              .pro-name {
                font-weight: bold;
                margin-top: 19px;
                margin-bottom: 8px;
                color: #333;
              }
              .pro-price {
                color: #ff6600;
              }
            }
          }
        }
      }
      .header-search {
        width: 319px;
        .wrapper {
          height: 50px;
          border: 1px solid #e0e0e0;
          display: flex;
          align-items: center;
          input {
            box-sizing: border-box;
            border: none;
            border-right: 1px solid #e0e0e0;
            width: 264px;
            height: 50px;
            padding-left: 14px;
          }
          a {
            @include bgImg(18px, 18px, "/imgs/icon-search.png");
            margin-left: 17px;
          }
        }
      }
    }
  }
}
</style>